Overview
RTS' CM-300L is a console mount, two-channel intercom user station. The user station is designed to be used in a full duplex, conference line intercom system.
Specifications
- Input DC Voltage:
- TW Mode: 18 to 35 volts DC
- LP Option: 15 to 35 volts DC
- Battery: 12 to 35 volts DC (reduced performance)
- DC Current Drawing from TW Line (Note: LP Option draws no current from TW line):
- Quiescent:
- - CM-300/RM-300: 23 milliamperes ±10%
- - CM-300/RM-300L: 33 milliamperes ±10%
- Operating 25 Ohm headphones:
- - CM-300/RM-300: 37 milliamperes ±10%
- - CM-300/RM-300L: 45 milliamperes ±10%
- Operating 25 Ohm headphones + Call Light: CM-300/RM-300: 60 milliamperes ±10%
- Impedance Across Line: 10,000 ohms, minimum
- Operating Temperature: 0°C to 60°C
- Storage Temperature: -40°C to 85°C
- Operating and Storage Humidity: 5% to 95% non-condensing
- Noise Contribution:
- One Unit: -75 dBu
- Ten Units: -67 dBu
- Microphone Preamplifier:
- Input Impedance: 470 ohms/dynamic mic
- Source Impedance: 200 ohms, nominal
- Maximum Input Level: 150 millivolts
- Frequency Response: 100 hertz to 10 kilohertz ±3 dB (-54 dBu input)
- Limiter Range: 30 dB
- Carbon Mic Excitation Current: 10 millliamperes, nominal
- Current Source:
- Transfer Ratio: 3.3 milliamperes/volt=3.3 millisiemens
- Output: ±5 milliamperes into 200 ohms = ±1 volt peak, nominal